How Many Solar Panels Required For Home?

  • To completely offset power expenditures with solar, an average home will require between 20 and 24 solar panels.
  • The amount of solar panels you’ll need is determined by a few factors, including your location and the characteristics of each panel.
  • If you reside in Massachusetts instead of California, you’ll need more solar panels to get the same output.

To power a home, how many solar panels are required?

Based on a monthly electricity demand of 877 kilowatt-hours (kWh), the average American home requires between 19 and 23 solar panels. After the federal solar tax credit, installing that many solar panels would cost between $13,000 and $16,200.

To power a three-bedroom house, how many solar panels do I need?

While there are numerous aspects to consider when estimating how many solar panels are required to power your home, there is a simple formula to follow. The general manager of Northeast Solar in Hatfield, MA, Gregg Garrison, provided some advice for the average homeowner in terms of the amount of panels needed to support both electrical and hot water needs.

According to Garrison, the average residence is about 1,500 square feet, with monthly electricity bills of around $100. To totally meet the electrical power needs of such a house, around 16 panels are required.

Two solar thermal panels would be required to heat water for a typical family of four, according to Garrison. “The average amount of hot water used is offset by roughly 70%.

Photovoltaic panels create electricity by converting solar radiation (light) into an electrical current through their cells. Photovoltaic (PV) cells are made of a number of materials, including silicon, arsenic, and selenium in various forms.

Solar thermal panels are a closed system of tubes containing an antifreeze-like fluid. Solar thermal panels absorb solar energy and transfer it to hot water storage tanks. Electrical hot water tanks, according to Garrison, are the greatest choice for solar hot water.

Depending on which direction your home faces (north/south or east/west), you’ll have more or less sunlight to convert into solar power. The amount of shade your property receives is the second major consideration.

Make an appointment with a professional to have your home inspected. They’ll use solar pathfinder technology to determine how much sun your home receives in a year, which will disclose how much power you could create. They’ll also use a specific equipment to assess the amount of shade and solar exposure. “After gathering all of the data, Garrison explained, “we download it into a program that provides us a more exact indication of electrical savings and output.”

According to Garrison, it takes roughly six to eight years for the average home (and 16 panels) to pay back the cost of installation. Furthermore, some electricity companies allow you to contract to sell extra power to be put back into the general grid, which can save you much more money in the long run.

Solar panels have become significantly less expensive over time. A 50-watt solar panel cost $215, or $4.30 per watt, seven years ago. A 50-watt panel nowadays costs $75, or $1.50 per watt.

The panels, on the other hand, are the least expensive component. Solar system components such as inverters, wiring, and mounts can cost up to $6,500 on average. Fees for installation, permits, and inspections must also be considered. The cost of installing a suitable solar panel system, including permits and inspections, will range between $2,000 and $5,000 for the ordinary homeowner.

Payback can take nearly twice as long if your property is particularly dark and you are unwilling to cut down the surrounding trees “Garrison advises that any shadowing on the roof affects the amount of production.

Remember that most solar panel systems are expected to endure between 25 and 30 years. Garrison commented, “You’re not getting anything in return from gas, oil, or electricity. Solar panels (for power) enable households to stabilize long-term energy expenses. You won’t be affected by energy market changes.

Homeowners can currently take advantage of a range of federal and state incentives to help pay for a portion of the system’s cost. Federal solar energy incentives have been extended on a step-down basis until December 31, 2021.


The cost of purchasing a solar system is relatively expensive at first. Solar panels, inverters, batteries, wiring, and installation are all included in this cost. Nonetheless, because solar technology is continually improving, it’s realistic to predict that prices will continue to fall in the future.


Although solar energy can be collected during overcast and rainy days, the solar system’s efficiency is reduced. Solar panels must be exposed to sunlight in order to collect solar energy. As a result, a couple of overcast, rainy days can have a significant impact on the energy system. It’s also important to remember that solar energy cannot be collected at night.

Thermodynamic panels, on the other hand, are an option to consider if you need your water heating solution to work at night or during the winter.

Check out our video for a breakdown of how effective solar panels are in the winter:

Why are solar panels a waste of money?

Because solar panels cannot store electricity, their production will be reduced in overcast conditions and will be nil at night. As a result, most home solar systems necessitate the usage of a solar battery. When evaluating if solar panels are worth it for you, keep this additional expense in mind.

When it comes to solar panels, how long do they last?

Photovoltaic (PV) panels, commonly known as solar panels, are designed to last for more than 25 years. Many solar panels that were placed as early as the 1980s are still operating at full power. 1 Solar panels are not only incredibly dependable, but their lifespan has risen substantially in the previous 20 years. 2 Many solar manufacturers back their equipment with performance guarantees in their warranties, in addition to decades of successful performance. 1

Keep in mind that just because your solar panels are predicted to last a couple of decades doesn’t imply they’ll stop producing electricity. It simply implies that their energy production will be reduced by the amount that solar panel manufacturers believe is necessary to meet the energy needs of the ordinary American family.

Is it possible to run my house solely on solar energy?

You can definitely run a whole house entirely on solar power with a contemporary solar energy system that includes power storage. With today’s high-efficiency solar panels and solar batteries, powering a full home solely with solar energy is now more affordable than ever.

Since the widespread use of solar energy for domestic and commercial purposes two decades ago, the cost of solar panel systems and installation has continued to fall. This is despite the fact that local and federal government rebates and tax credits, as well as utility company incentives, are all declining year after year. The significant reduction in solar costs is due in part to the widespread adoption of solar energy on a national and global scale, and in part to quick developments in solar energy system technology.

Start with these fundamental analyses to determine the cost-effectiveness and other viability elements of maintaining a totally solar-powered home:

Calculate how much electricity you use per month.

To begin, calculate how much solar energy you’ll need to power your complete home entirely using solar energy. You’ll need to know how much electricity you use on a monthly basis to do so. This will allow your solar contractor to estimate how much energy your panels will need to generate each month to power your entire home.

Of course, monthly usage and solar power production potential are projected to fluctuate throughout the year. The reserve capacity of today’s state-of-the-art domestic solar battery storage is the solution to maintaining a consistent power supply for your home. Your solar batteries allow you to store the excess electricity generated by your solar panels on longer, sunnier days for use at a later time when the weather is less sunny.

Solar batteries ensure you have enough electricity to run your complete home during periods of less direct, bright sunlight, without the system automatically drawing from the public power grid.

Evaluate your climate region’s solar energy production capacity.

Whether you can expect to generate enough solar energy to power your entire house year-round depends entirely on the environment you reside in. Examine whether the climate in your area has the ability to produce enough solar energy to power your entire home on a continual basis.

Running a house fully on solar throughout the winter months may be more difficult for homeowners in colder, cloudier climates, such as those along the northwest Pacific coast. Residents may go weeks without seeing direct sunlight, while residents in the southwest may go weeks without seeing a gloomy day.

These climatic changes, combined with circumstances unique to your home and lifestyle, can mean the difference between being able to operate fully off the grid or continuing to rely on your utility company for at least some electricity.

Assess your solar production environment based on your home’s surroundings.

Consider the number and location of huge trees growing around and near your property, as well as the heights of nearby houses and other structures. Large trees and tall homes that are close enough to your home to create heavy shade across your roof for more than a third of the bright hours might impair the efficiency of your solar energy system significantly.

How many air conditioners can 5kW power?

The 5kW solar system is designed for large homes, workplaces, and retail stores. Customers who have regular power outages in their homes, businesses, and other locations will benefit from UTL’s 5kW solar system. It is equipped with a 5.5kVA solar inverter. It can easily run a 2 ton air conditioner with 2 fans, 8 LED lights, and 1 refrigerator.

The cost of a 5kW solar system is determined by the type of solar system. Three types of 5kW solar systems are available. 1st solar system is on-grid, 2nd solar system is off-grid, and 3rd solar system is hybrid. The 5 kW solar system at UTL produces 20 units per day.

Is it possible to run an air conditioner on a solar panel?

As weather conditions worsen due to rising global warming and rising levels of air pollution, an increasing number of individuals are installing air conditioners. As a result, air conditioners are more widespread in homes, schools, workplaces, and other commercial establishments. Not only that, but air conditioners are utilized 24 hours a day, seven days a week in hospitals, theaters, and other places. Installing a Solar System at Medical Institutes for a 20% ROI and lower electricity expenses was the subject of our last blog. Due to the high wattage of air conditioners, increased use has resulted in high power bills, and consumers are looking for ways to cut their electricity costs.

People are considering installing solar panels to power their air conditioners in order to save money on their electricity costs. Is this, however, feasible? Is it possible to run air conditioners on solar panels? The answer is a resounding YES.

Off-grid and on-grid solar systems are the two most common types of solar systems.

Solar panels, inverters, and batteries make up an off-grid solar system. This system is capable of operating without the use of a grid.

On-grid solar systems, on the other hand, comprise of solar panels and an inverter, and appliances will not operate if there is no energy.

To manage high loads, make sure to use inverters with a high kVA rating. If your AC demand is significant, you should also install extra solar panels with a higher kW rating.

Both of these technologies are capable of running air conditioners. However, even if there is no energy, an off-grid solar system can keep the air conditioners operating (as batteries store the excess power generated by the sun, which helps in running the appliance even when there is no supply from the grid). On-grid solar systems with capacities ranging from 3 kW to 10 kW may readily run air conditioners. Large commercial office spaces (with electricity rates as high as Rs. 1 lakh) to houses can all benefit from an on-grid solar system (with bills of Rs.5-10k per month). People can also take advantage of net metering rules to receive a credit on their electricity bills.

  • Government approvals – A company that installs an on-grid rooftop solar system is eligible for a number of government incentives and subsidies. As a result, relevant government approvals and documentation, such as legitimate identity evidence and property papers, are required in order to obtain the same. On-grid solar systems for domestic use are eligible for a 20% subsidy, with a capital subsidy of up to INR 20,000 per kilowatt. To be eligible for the benefit, the eligible party must have a grid-connected, battery-free system and be a domestic consumer.
  • Rooftop space – Installing an on-grid system is simple and can be done on the rooftop by oneself. Rooftops of commercial complexes, housing societies, community centers, government organizations, and private institutions, among others, can be used for such installations. With its flexible structure design, it can be mounted on both the ground level and the rooftop.
  • For every kilowatt of installed power, a minimum of 100 square feet is required.
  • Maintenance – When compared to an off-grid solar system, an on-grid solar system requires less maintenance and has a longer lifespan.

According to MNRE, the benchmark cost of grid-connected rooftop solar in India is Rs. 60 per watt.

Though still a tiny market in India, the concept of using solar energy to power air conditioners is likely to grow significantly in the future. Solar power appears to be a reasonable and economical option to reduce electricity costs in nations like India, where there is enough sunlight to generate big amounts of solar energy while equipment such as air conditioning consume enormous amounts of energy.

How many 5kW solar panels do you use every day?

Any solar power system’s energy output is determined by the sun’s energy, or irradiance, which varies from state to state.

The irradiance at peak-sun-hours in Arizona, for example, is three times higher than in Alaska, thus the difference might be significant. For most purposes, estimating solar output with an average irradiance value of 4 peak-sun-hours is sufficient.

(Note: Peak-sun-hours is a convenient way of expressing irradiance, which is measured in kWh/m2/day properly speaking) (or year.)